Black Body radiation is the light produced by something that is hot, regardless of the color of that thing when we view it by other light. It contains "all colors" but not equally. We can observe that by breaking the colors of light apart using a specroscope. A black body is a theoritical (not real) object that absorbs all radiation that hits it, and thus appears black.
Our Sun is an example of a "real world" black body radiator. It's spectrum isn't as smooth as the "ideal" and this is due to Emission Lines, the other source of light.
Depth of Knowledge
Prerequisite Knowledge
Plans for Differentiating Instruction
Accommodations and modifications
Environmental factors
Materials
Incandescent (tungsten filament) lamps with variable voltage supply to dim them.
Prism Spectroscope
Diffraction Grating Spectroscope
Neon (and other) Gas Tubes
Infrared non-contact thermometer.
Bunsen burner or alcohol burner
(This list needs a safety review, for which I am not qualified)
Flame Colorants
Color
Chemical
Carmine
Lithium Chloride
Red
Strontium Chloride
Orange
Calcium Chloride (a bleaching powder)
Yellow
Sodium Chloride (table salt)
or Sodium Carbonate
Yellowish Green
Borax
Green
Copper Sulfate or Boric Acid
Blue
Copper Chloride
Violet
3 parts Potassium Sulfate
1 part Potassium Nitrate (saltpeter)
Lesson Plan
Lesson Title: Black Body and Emission Lines
State Standards: GLEs/GSEs
National Standards:
Context of Lesson:
Opportunities to Learn:
Black Body radiation is the light produced by something that is hot, regardless of the color of that thing when we view it by other light. It contains "all colors" but not equally. We can observe that by breaking the colors of light apart using a specroscope. A black body is a theoritical (not real) object that absorbs all radiation that hits it, and thus appears black.
Our Sun is an example of a "real world" black body radiator. It's spectrum isn't as smooth as the "ideal" and this is due to Emission Lines, the other source of light.
Depth of Knowledge
Prerequisite Knowledge
Plans for Differentiating Instruction
Accommodations and modifications
Environmental factors
Materials
Incandescent (tungsten filament) lamps with variable voltage supply to dim them.Prism Spectroscope
Diffraction Grating Spectroscope
Neon (and other) Gas Tubes
Infrared non-contact thermometer.
Bunsen burner or alcohol burner
(This list needs a safety review, for which I am not qualified)
Flame Colorants
or Sodium Carbonate
1 part Potassium Nitrate (saltpeter)
Objectives:
Instruction:
Opening:
Engagement:
Closure:
Assessment:
Reflections
(only done after lesson is enacted)Student Work Sample 1 – Approaching Proficiency:
Student Work Sample 2 – Proficient:
Student Work Sample 3 – Exceeds Proficiency: